›› 2011, Vol. 24 ›› Issue (3): 47-.

• 论文 • 上一篇    下一篇

基于DSP的轨道移频信号解调实现

苗成伟,陈光武,高建国,王丽萍   

  1. (兰州交通大学 光电技术与智能教育部重点实验室,甘肃 兰州 730070)
  • 出版日期:2011-03-15 发布日期:2011-03-11
  • 作者简介:苗成伟(1983-),男,硕士。研究方向:交通信息工程及控制。
  • 基金资助:

    铁道部重点基金资助项目(2007X003-D)

The Realization of the Demodulation of the Frequency-shift Track Based on DSP

 MIAO Cheng-Wei, CHEN Guang-Wu, GAO Jian-Guo, WANG Li-Ping   

  1. ([Key Laboratory of Opto-Electronic Technology and Intelligent Control,Lanzhou Jiaotong University,Lanzhou 730070,China)
  • Online:2011-03-15 Published:2011-03-11

摘要:

提出了以双路TMS320F2812为核心,接收解调ZPW-2000A的FSK信号。前端通过信号调理,利用DSP内部的AD对FSK信号采样。经过FFT变换解调出载频频率、Z-FFT解调低频频率,以及通过DSP的SPI口,对两路解调出的信号进行比较,若一致,则输出。该设计采用双机热备,使系统的工作可靠性更强。结果证明,系统有较高的频率分辨率和实时性。

关键词: DSP;FSK;ZPW2000A

Abstract:

This paper proposes the FSK signal which receives and demodulates the ZPW-2000A with the dual TMS320F2812 as the core.The forepart samples the FSK signal with the internal A/D of DSP by signal conditioning.The calculation of FFT demodulates the carrier frequency and then Z-FFT calculates the low frequency,and finally through the port of DSP's SPI the two outputs are compared.If they are the same,the signal is output.This design uses a hot standby to improve the reliability of the system.The results show that the system has high frequency resolution and good real-timeness.

Key words: DSP;FSK;ZPW2000A

中图分类号: 

  • TN911.72